Let's divide 642451 by 87
Let's see how many times 87 fits into 642451.

Going ahead to step 1:
When dividing 6 by 87, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 87

Step 2:
64 divided by 87 is 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Append the next digit (2) from the dividend to 64 and continue with: 642 / 87

Going ahead to step 3:
642 divided by 87 is 7 with a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 609 from 642 to get 33.
Grab the next digit (4) from the dividend, add it to 33, then carry on: 334 / 87

Moving on to step 4:
334 divided by 87 is 3 with a remainder of 73.
Write down 3 as next digit of the result. 
Result so far: 73.0
Subtract 261 from 334 to get 73.
Fetch the next digit (5) from the dividend, attach it to 73 and continue: 735 / 87

On to step 5:
87 can be fit into 735 8 times, resulting in a remainder of 39.
Put 8 as the next digit of the answer. 
Result so far: 738.0
If we subtract 696 from 735, we get 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 87

Advancing to step 6:
If we divide 391 by 87, we get 4 and a remainder of 43.
Record the quotient 4 as the next digit in the result. 
Result so far: 7384.0
Deduct 348 from 391 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 7:
When dividing 430 by 87, we get 4 with a remainder of 82.
The next digit of our result is 4. 
Result so far: 7384.4
If we take 348 away from 430, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 8:
87 can be fit into 820 9 times, resulting in a remainder of 37.
Record the quotient 9 as the next digit in the result. 
Result so far: 7384.49
Deduct 783 from 820 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 9:
87 goes into 370 4 times with a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 7384.494
Deduct 348 from 370 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
When dividing 220 by 87, we get 2 with a remainder of 46.
The next digit of our result is 2. 
Result so far: 7384.4942
If we subtract 174 from 220, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 11:
When dividing 460 by 87, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 7384.49425
If we subtract 435 from 460, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 12:
If we divide 250 by 87, we get 2 and a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 7384.494252
If we take 174 away from 250, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 13:
87 goes into 760 8 times with a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 7384.4942528
Subtracting 696 from 760 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 14:
87 can be fit into 640 7 times, resulting in a remainder of 31.
Put 7 as the next digit of the answer. 
Result so far: 7384.49425287
Subtracting 609 from 640 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

After the division, we end up with 7384.49425287 and a remainder of 3.1e-08.